High precision rigid gas-permeable contact lens edge curve polishing lathe

ABSTRACT

A high precision rigid gas-permeable contact lens edge curve polishing lathe includes a base provided at the bottom of a machine body. A first crank and a second crank are respectively provided on two sides of the base. A detent mechanism is provided on both the first crank and the second crank. The detent mechanism includes an ejector pin matching the rotational direction of the first crank and the second crank and a numerical display unit revealing the position of the ejector pin. The contact position of a polishing sponge on a spindle of the polishing lathe and a lens can be precisely positioned through numerical reading, realizing quantized control of the polishing of a lens edge, and enabling improvement and modification to the design of the lens edge to become simpler.

FIELD OF THE INVENTION

The present invention relates to a polishing equipment, and in particular, to a high precision rigid gas-permeable contact lens edge curve polishing lathe.

BACKGROUND OF THE INVENTION

A rigid gas permeable contact lens (RGP lens) is one of the most effective refractive error correction methods and appliances accepted by international optometry and ophthalmology academia and industry at present. With the further development and popularization of the RGP lens, production, polishing and detection equipment related thereof are continuously updated and improved. The high precision rigid gas-permeable contact lens edge curve polishing lathe employed at present mainly has the defect of the imprecise positioning of edge polishing which causes that the lens edge polishing position cannot be quantitatively controlled so as to cause imprecise edge polishing of the needed lens and cause the lens to lack comfort level while being worn on human eyes, thus directly affecting the lens quality.

SUMMARY OF THE INVENTION

To overcome the defects in the prior art, the present invention provides lathe for a rigid gas permeable contact lens which solves the problem of the existing polishing lathe that the lens edge polishing position cannot be quantitatively controlled, resulting in reduced polishing positioning precision. Embodiments of the invention can facilitate improvement and correction of lens edge design to make the lens edge polishing meet the comfort requirement, thus improving the lens quality.

The technical solution of the present invention is as follows: a high precision rigid gas-permeable contact lens edge curve polishing lathe, comprising a machine body, wherein the upper end surface of the machine body is provided with a waste liquid tank; the inside of the waste liquid tank is provided with a concave lens holder and a convex lens holder provided in a row and capable of rotating circumferentially; the two sides of the machine body are, respectively, provided with a first crank and a second crank; the inside of the first crank and the inside of the second crank are, respectively, provided with a first rotating spindle and a second rotating spindle provided with a polishing chuck at the front end and capable of rotating circumferentially; the first crank and the second crank rotate along the lateral surface of the machine body such that the polishing chuck can match with the lens held by the concave lens holder and the convex lens holder; a base is provided at the bottom of the machine body; a first support and a second support are, respectively, fixed to two sides of the base. A positioning mechanism is provided on both the first support and the second support. The positioning mechanism comprises an abutting pin aligned with the rotational direction of the first crank and the second crank and a numerical display unit for displaying the position of the abutting pin.

The abutting pin is a measuring pole of a caliper; the numerical display unit comprises scales on the caliper; the measuring pole penetrates through a fixed sleeve of the caliper and is connected with a knob; a periphery of the fixed sleeve is provided with a movable sleeve; the scales are provided on the fixed sleeve and the movable sleeve; the knob is rotatably matched with the measuring pole, the movable sleeve and the fixed sleeve to enable the measuring pole adjustable front and back along the lateral surface of the machine body and form circumferential rotation and axial movement of the movable sleeve.

The top end of the measuring pole is provided with a ball bead in contact with the first crank and the second crank.

The two sides of the base are provided with supporting arms on which the first support and the second support are, respectively, fixed.

The first support and the second support are provided with through holes; the measuring pole penetrates through the through holes and is fixed on the first support and the second support by bolts.

The ball bead is provided with a groove, and the ball bead is connected with the measuring pole via the groove.

The ball bead is manufactured from a copper material.

The base and the supporting arms are integrally provided.

Compared with the prior art, the high precision rigid gas-permeable contact lens edge curve polishing lathe has the beneficial effects as follows: the positioning mechanism of the polishing lathe has a simple mechanical structure and is convenient to use; the contact position between a polishing sponge and a lens (both mounted on a spindle of the polishing lathe) can be precisely ascertained through the numerical readings to achieve quantitative control of the polishing of a lens edge, and making improvement and modification to the design of the lens edge simpler. Thus, lenses meeting customized designs specific to the eyes of a person and achieving optimal comfort can be produced, effectively improving product quality.

DESCRIPTIONS OF THE DRAWINGS

FIG. 1 illustrates a structure diagram of the present invention.

In FIG., 1 refers to machine body, 2 refers to waste liquid tank, 3 refers to concave lens holder, 4 refers to convex lens holder, 5 refers to first crank, 6 refers to second crank, 7 refers to first rotating spindle, 8 refers to second rotating spindle, 9 refers to polishing chuck, 10 refers to base, 11 refers to first support, 12 refers to second support, 13 refers to measuring pole, 14 refers to movable sleeve, 15 refers to fixed sleeve, 16 refers to knob, 17 refers to ball bead, 18 refers to supporting aim, 19 refers to through hole, and 20 refers to bolt.

DETAILED DESCRIPTIONS OF THE EXAMPLE EMBODIMENTS

The example embodiments of the present invention will be introduced further with reference to FIG. 1.

As illustrated in FIG. 1, the high precision rigid gas-permeable contact lens edge curve polishing lathe, comprising a machine body, wherein the upper end surface of the machine body is provided with a waste liquid tank 2; the inside of the waste liquid tank 2 is provided with a concave lens holder 3 and a convex lens holder 4 provided in parallel and capable of rotating circumferentially; the two sides of the machine body 1 are respectively provided with a first crank 5 and a second crank 6; the inside of the first crank 5 and the inside of the second crank 6 are respectively provided with a first rotating spindle 7 and a second rotating spindle 8 provided with a polishing chuck 9 at the front end and capable of rotating circumferentially; the first crank 5 and the second crank 6 rotate along the lateral surface of the machine body 1 to form match between the polishing chuck 9 and lenses on the concave lens holder 3 and the convex lens holder 4; a base 10 is provided at the bottom of the machine body 1; the two sides of the base 10 are respectively fixed with a first support 11 and a second support 12; both the first support 11 and the second support 12 are provided with a positioning mechanism and the positioning mechanism comprises an abutting pin matching the rotational direction of the first crank 5 and the second crank 6 and a numerical display unit displaying the position of the abutting pin. According to the solution, the positioning mechanism of the polishing lathe has a simple mechanical structure and is convenient to use; the contact position of a polishing sponge on a spindle of the polishing lathe and a lens can be precisely positioned through numerical reading to realize quantized control of the polishing of a lens edge, and enabling improvement and modification to the design of the lens edge to become simpler. Thus, lenses meeting a design customized to the eyes of a person and achieving optimal comfort can be produced, effectively improving product quality.

As illustrated in FIG. 1, the abutting pin is a measuring pole 13 of a caliper; the numerical display unit comprises scales on the caliper; the measuring pole 13 penetrates through a fixed sleeve 15 of the caliper and is connected with a knob 16; a periphery of the fixed sleeve 15 is provided with a movable sleeve 14; the scales are provided on the fixed sleeve 15 and the movable sleeve 14; the knob 16 is rotatably coordinate with the measuring pole 13, the movable sleeve 14, and the fixed sleeve 15 to enable the measuring pole 13 adjustable front and back along the lateral surface of the machine body 1 and form circumferential rotation and axial movement of the movable sleeve 14. The measuring pole 13, the movable sleeve 14, the fixed sleeve 15 and the knob 16 are components of the caliper; as the precision of the caliper is high, a distance between the polishing chuck 9 and the lens edges can be positioned accurately and effectively; the optimal polishing position between the polishing chuck 9 and the lens edges on the concave lens holder 3 and the convex lens holder 4 is obtained after many experiments according to distribution positions of the cranks, the concave lens holder 3 and the convex lens holder 4 on the polishing lathe, thus producing the lens with optimal comfort level; moreover, the effects of the lens are significantly improved relative to that of the existing polishing equipment.

As illustrated in FIG. 1, the top end of the measuring pole 13 is provided with a ball bead 17 contacted with the first crank 5 and the second crank 6; the ball bead 17 is manufactured by a copper material and easy to process; assuredly, other metal materials such as stainless steel can be employed; sheathing the ball bead 17 on the head of the measuring pole 13 can effectively improve the positioning precision; the cranks can be pushed to actuate by finely tuning the knob 16 so as to show the locating precision between the polishing chuck 9 and the lens edges. The ball bead 17 is provided with a groove, and the ball bead 17 is connected with the measuring pole 13 through the groove so that the ball bead 17 is firmly connected with the measuring pole 13 to improve the stability.

As illustrated in FIG. 1, the two sides of the base 10 are provided with supporting arms 18 on which the first support 11 and the second support 12 are respectively fixed. The base 10 and the supporting arms 18 are integrally molded; the supporting arms 18 are arranged at the two sides of the base 10; the first support 11 and the second support 12 are fixed on the supporting arms 18 via bolts 20; the first support 11 and the second support 12 are provided with through holes 19; the measuring pole penetrates through the through holes 19 and is fixed on the first support 11 and the second support 12 through the bolts 20.

The embodiments shall not be considered as a limitation to the present invention. However, any improvement made based on the spirit of the present invention shall fall within the protection scope of the present invention. 

1. A high precision rigid gas-permeable contact lens edge curve polishing lathe, comprising a machine body, wherein an upper end surface of the machine body is provided with a waste liquid tank; inside of the waste liquid tank is provided with a concave lens holder and a convex lens holder provided in parallel and capable of rotating circumferentially; two sides of the machine body are respectively provided with a first crank and a second crank; inside of the first crank and inside of the second crank are respectively provided with a first rotating spindle and a second rotating spindle, wherein the first rotating spindle and the second rotating spindle are provided with a polishing chuck at the front end and capable of rotating circumferentially; the first crank and the second crank rotate along the lateral surface of the machine body to form a match between the polishing chuck and lenses on the concave lens holder and the convex lens holder; a base is provided at the bottom of the machine body; a first crank and a second crank are respectively provided on two sides of the base; a positioning mechanism is provided on both the first crank and the second crank, wherein the positioning mechanism comprises an abutting pin matching the rotational direction of the first crank and the second crank and a numerical display unit displaying the position of the abutting pin.
 2. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 1, wherein the abutting pin is a measuring pole of a caliper; the numerical display unit is a scale on the caliper; the measuring pole penetrates through a fixed sleeve of the caliper and is connected with a knob; a periphery of the fixed sleeve is provided with a movable sleeve; the scale is provided on the fixed sleeve and the movable sleeve; the knob is rotatably matched with the measuring pole, the movable sleeve and the fixed sleeve to enable the measuring pole adjustable front and back along the lateral surface of the machine body and form circumferential rotation and axial movement of the movable sleeve.
 3. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 2, wherein the top end of the measuring pole is provided with a ball bead contacted with the first crank and the second crank.
 4. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 1, wherein the two sides of the base are provided with supporting arms on which the first crank and the second crank are respectively fixed.
 5. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 1, wherein the first crank and the second crank are provided with through holes; the measuring pole penetrates through the through holes and is fixed on the first crank and the second crank through the bolts.
 6. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 3, wherein the ball bead is provided with a groove, and the ball bead is connected with the measuring pole via the groove.
 7. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 3, wherein the ball bead is manufactured from a copper material.
 8. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 4, wherein the base and the supporting arms are integrally provided.
 9. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 2, wherein the two sides of the base are provided with supporting arms on which the first crank and the second crank are respectively fixed.
 10. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 3, wherein the two sides of the base are provided with supporting arms on which the first crank and the second crank are respectively fixed.
 11. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 2, wherein the first crank and the second crank are provided with through holes; the measuring pole penetrates through the through holes and is fixed on the first crank and the second crank through the bolts.
 12. The high precision rigid gas-permeable contact lens edge curve polishing lathe of claim 3, wherein the first crank and the second crank are provided with through holes; the measuring pole penetrates through the through holes and is fixed on the first crank and the second crank through the bolts. 